3 years ago

Which is a possible expression for the series

1 answer:

4 0

Without considering the sign:

It's sigma(1 to 5, 5k+2)

Since the first item is minus, you simply add (-1)^k

So it's sigma(1 to 5, (-1)^k * (5k+2)

I choose A

You might be interested in

I think of a number N. I add 5 to N and then multiply the answer by 3. The result is 84. What is the number N that l first thoug

Grace [21]

The answer is 26.33 repeating
How you get that answer is
First do N times 3
so the you have 3n + 5 = 84
minus 5 from both sides and then you get 3n = 79
divid both sides by 3 and then you get n = 26.33 reapting

4 0

3 years ago

Read 2 more answers

These triangles are similar. True Or False

iren2701 [21]

Answer:

True because they both are triangles, they both have tree side but one is just smaller than the other.

3 0

3 years ago

the ratio of goats to sheep at a university research farm is 4: 7. The number of sheep at the arm is 28. what is the number of g

GalinKa [24]

4+7=11 i.e. The whole.
7/11=28

1/11=4
Goats are 4/11 therefore
4 x 4= Ans
All the animals add up to 44 and if you check w/ 7/11 it is correct.